This article corrects:

    In Wade et al. (2012) an error appeared in the title.

    ‘μ opioid receptor antagonist’ was incorrect and should have read ‘δ opioid receptor antagonist.’ The full, correct title of the paper is ‘Modulation of gastrointestinal function by MuDelta, a mixed μ opioid receptor agonist/ δ opioid receptor antagonist.’

    We apologize for this error and any confusion it may have caused.